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21.
David C. Tyler Joyce C. Melvin Yang Xu Marylou Epp Anita M. Kreps 《Journal of Interlibrary Loan, Document Delivery & Electronic Reserve》2013,23(1-2):57-90
In the library literature, a great deal of interest in patron-driven collection development has recently been expressed, especially in those programs that link acquisitions with interlibrary loan. However, the implementation of such programs has been limited, at least in part because of concerns over the potential for wasteful spending. The authors will attempt to address this common concern by assessing whether monies spent via a patron-driven acquisitions program were more or less effective than monies spent via traditional modes of acquisition. 相似文献
22.
Melvin L. DeFleur 《Mass Communication and Society》2013,16(1-2):85-98
Between about 1930 and the early 1980s, a number of seminal research studies yielded most of today's theories of the process and effects of mass communication. Since that time, few studies have made significant theoretical contributions. This apparent slowdown is inconsistent with certain trends in the media industries and in the academy that logically should result in greater production of seminal studies. The question is why so few milestones have been produced in recent years? A possible answer is that certain trends are taking place in U.S. society that tend to reduce the number of ground-breaking studies that will be produced by contemporary academics. Specifically, social scientists have turned from media studies to their more traditional research agenda; increasing attention is being paid to qualitative analysis by today's media scholars, and many are now preoccupied with critical perspectives rather than research. Additionally, higher pay in applied research may be drawing bright doctors of philosophy away from basic studies; heavy use of part-time instructors increases the workload of full-time faculty; and, finally, funding for basic research in mass communication is increasingly difficult to find. 相似文献
23.
In this essay, the researchers explore the careers of four foundational figures in sport management, who received training as historians. Drawing on a wide range of primary and secondary sources, we illustrate how Earle Zeigler, Guy Lewis, Stephen Hardy, and Lawrence Fielding helped create the field of Sport Management with insights drawn from business historians, especially those at the Harvard Business School. Overall, we claim that sport business history can serve to help frame much of the field and is vitally relevant to the study of the sports industry. Furthermore, we advocate that the study of history be included as a prominent area within sport management curriculums. To support this assertion, we elucidate the importance of the historical case-study approach to sport management. 相似文献
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Karla de Jesus Kelly de Jesus J. Arturo Abraldes Luis Mourão Márcio Borgonovo-Santos Alexandre I. A. Medeiros 《Sports biomechanics / International Society of Biomechanics in Sports》2016,15(4):481-496
Foot and hand set-up position effects were analysed on backstroke start performance. Ten swimmers randomly completed 27 starts grouped in trials (n = 3) of each variation, changing foot (totally immersed, partially and totally emerged) and hand (lowest, highest horizontal and vertical) positioning. Fifteen cameras recorded kinematics, and four force plates collected hands and feet kinetics. Standardised mean difference and 95% confidence intervals were used. Variations with feet immersed have shown lower vertical centre of mass (CM) set-up position (0.16 m), vertical impulse exerted at the hands, horizontal and vertical impulse exerted at the feet (0.28, 0.41, 0.16 N/BW.s, respectively) than feet emerged with hands horizontal and vertically positioned. Most variations with feet partially emerged exhibited higher and lesser vertical impulse exerted at hands than feet immersed and emerged (e.g. vertical handgrip, 0.13, 0.15 N/BW.s, respectively). Variation with feet emerged and hands on the lowest horizontal handgrip depicted shorter horizontal (0.23, 0.26 m) and vertical CM positioning at flight (0.16, 0.15 m) than the highest horizontal and vertical handgrip, respectively. Start variations have not affected 15-m time. Variations with feet partially or totally emerged depicted advantages, but focusing on the entry and underwater biomechanics is relevant for a shorter start time. 相似文献
29.
Karla de Jesus Kelly de Jesus J. Arturo Abraldes Alexandre Igor Araripe Medeiros Ricardo J. Fernandes João Paulo Vilas-Boas 《Journal of sports sciences》2016,34(9):871-877
We aimed to analyse the handgrip positioning and the wedge effects on the backstroke start performance and technique. Ten swimmers completed randomly eight 15 m backstroke starts (four with hands on highest horizontal and four on vertical handgrip) performed with and without wedge. One surface and one underwater camera recorded kinematic data. Standardised mean difference (SMD) and 95% confidence intervals (CI) were used. Handgrip positioning did not affect kinematics with and without wedge use. Handgrips horizontally positioned and feet over wedge displayed greater knee angular velocity than without it (SMD = ?0.82; 95% CI: ?1.56, ?0.08). Hands vertically positioned and feet over wedge presented greater take-off angle (SMD = ?0.81; 95% CI: ?1.55, ?0.07), centre of mass (CM) vertical positioning at first water contact (SMD = ?0.97; 95% CI: ?1.87, ?0.07) and CM vertical velocity at CM immersion (SMD = 1.03; 95% CI: 0.08, 1.98) when comparing without wedge use. Swimmers extended the hip previous to the knee and ankle joints, except for the variant with hands vertically positioned without wedge (SMD = 0.75; 95% CI: ?0.03, 1.53). Swimmers should preserve biomechanical advantages achieved during flight with variant with hands vertically positioned and wedge throughout entry and underwater phase. 相似文献
30.
G. Melvin Hipps 《College Teaching》2013,61(4):246-248